admin-guide/gpio/gpio-virtuser.rst

3 Virtual GPIO Consumer
6 The virtual GPIO Consumer module allows users to instantiate virtual devices
8 consumer devices can be instantiated from device-tree or over configfs.
10 A virtual consumer uses the driver-facing GPIO APIs and allows to cover it with
17 The gpio-consumer module registers a configfs subsystem called
22 values of exposed attributes. Once the consumer is instantiated, this hierarchy
27 This is the top directory of the gpio-consumer configfs tree.
29 **Group:** ``/config/gpio-consumer/example-name``
31 **Attribute:** ``/config/gpio-consumer/example-name/live``
33 **Attribute:** ``/config/gpio-consumer/example-name/dev_name``
35 This is a directory representing a GPIO consumer device.
51 **Group:** ``/config/gpio-consumer/example-name/con_id``
60 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/key``
62 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/offset``
64 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/drive``
66 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/pull``
68 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/active_low``
70 **Attribute:** ``/config/gpio-consumer/example-name/con_id/0/transitory``
96 order to instantiate the consumer. It can be set back to 0 to destroy the
108 An example device-tree code defining a virtual GPIO consumer:
112     gpio-virt-consumer {
149 **Attribute:** ``/sys/kernel/debug/gpio-virtuser/$dev_name/gpiod:foo:$index/consumer``
151 Allows to set and read the consumer label of the GPIO line.